Angle that is smaller than a right angle (less than 90Â°). Angle formed by two lines or two perpendicular planes that measures 90Â°. Symbol denoting that a straight line meets another at a right angle. Symbol denoting that two straight lines do not remain at a constant distance from one other. Symbol denoting that two straight lines remain at a constant distance from one another.
Constriction vs. Dilation. Constriction and dilation are opposite, but related, processes in the body. Whereas dilation is an opening or widening of a structure or passageway to increase material flow, constriction leads to a decrease in material flow by closing the passage.
opposite (a.). Applied to the other of two things which are entirely different; other; as, the opposite sex; the opposite extreme; antonyms have opposite meanings. Opposite (n.). That which is opposed or contrary in character or meaning; as, sweetness and its opposite; up is the opposite of down.pposite (a.). Applied to the other of two things which are entirely different; other; as, the opposite sex; the opposite extreme; antonyms have opposite meanings. Opposite (n.). That which is opposed or contrary in character or meaning; as, sweetness and its opposite; up is the opposite of down.